/* B34N5x - dark XRP/Matrix theme. No external fonts. */
*{box-sizing:border-box}
:root{--bg:#07090b;--panel:#0d1417;--line:#1c3a36;--text:#d7e4df;--dim:#9fb3ad;--green:#3df58f;--teal:#2ee6d0;--link:#5ff0c8;--mono:"DejaVu Sans Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--link)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--teal);outline-offset:2px}
.wrap{max-width:860px;margin:0 auto;padding:0 20px;position:relative}
h1,h2,h3,nav .brand{font-family:var(--mono)}
header{background:#050708;border-bottom:1px solid var(--line)}
nav{display:flex;align-items:center;gap:20px;padding:14px 0;flex-wrap:wrap}
nav .brand{font-weight:700;color:var(--green);text-decoration:none;margin-right:auto;letter-spacing:.04em}
nav .brand::before{content:"> ";color:var(--teal)}
nav a{text-decoration:none;font-weight:500;color:var(--text)}
nav a:hover{color:var(--green)}
nav a[aria-current]{color:var(--green);border-bottom:2px solid var(--green)}
.hero{padding:56px 0 32px}
.hero h1{font-size:clamp(1.6rem,4.5vw,2.4rem);line-height:1.25;margin:0 0 14px;color:var(--green)}
.hero p{font-size:1.1rem;color:var(--dim);margin:0}
/* Home banner hero */
.banner{position:relative;border-bottom:1px solid var(--line);overflow:hidden;background:#020403}
.banner picture img{display:block;width:100%;height:auto;max-height:500px;object-fit:cover}
.banner canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;opacity:.55}
.banner .overlay{position:absolute;inset:0;display:flex;align-items:flex-end;background:linear-gradient(180deg,rgba(2,4,3,0) 30%,rgba(2,4,3,.92) 100%)}
.banner .overlay .wrap{width:100%;padding-bottom:28px}
.banner h1{font-size:clamp(1.4rem,4.2vw,2.5rem);line-height:1.25;margin:0 0 10px;color:var(--green);text-shadow:0 0 12px rgba(61,245,143,.35)}
.banner p{margin:0;color:#e3efe9;font-size:1.05rem;max-width:640px}
.xmark{position:absolute;top:14px;right:14px;z-index:2;margin:0;padding:6px;background:rgba(5,7,8,.6);border:1px solid var(--line);border-radius:10px;cursor:pointer;line-height:0}
.xmark img{width:32px;height:32px}
.xmark:hover{border-color:var(--green)}
section{margin:28px 0}
h2{color:var(--teal);font-size:1.25rem;margin-bottom:10px}
h2::before{content:"// ";color:var(--green)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:12px 0}
.card h3{margin:0 0 6px;font-size:1.05rem;color:#eafff4}
.card.disabled{opacity:.6}
.tag{display:inline-block;background:#0f2e27;color:var(--green);font-size:.8rem;padding:2px 10px;border-radius:99px;font-family:var(--mono)}
.note{background:#0b1d1a;border-left:4px solid var(--teal);padding:12px 16px;border-radius:6px}
label{font-weight:600;display:block;margin:12px 0 6px}
input[type=text]{width:100%;padding:12px;font-size:1rem;border:1px solid #2b5a52;border-radius:8px;font-family:var(--mono);background:#050a09;color:var(--text)}
input::placeholder{color:#7f948e}
button{margin-top:14px;background:var(--green);color:#03140b;font-weight:700;border:0;border-radius:8px;padding:12px 22px;font-size:1rem;cursor:pointer;font-family:var(--mono)}
button:disabled{background:#2c6b4a;color:#cfe;cursor:wait}
fieldset{border:1px solid var(--line);border-radius:8px;padding:10px 14px}
fieldset label{display:inline;font-weight:500;margin-right:16px}
.dim{color:var(--dim)}
.result{margin-top:18px;padding:14px 16px;border-radius:8px;display:none}
.result.ok{display:block;background:#0b2219;border:1px solid #23704a}
.result.err{display:block;background:#2a0f12;border:1px solid #8a2f38;color:#ffd9dc}
.result .big{font-size:1.6rem;font-weight:700;color:var(--green);font-family:var(--mono)}
footer{border-top:1px solid var(--line);margin-top:48px;padding:20px 0;color:var(--dim);font-size:.9rem;text-align:center;font-family:var(--mono)}
.netbanner{padding:10px 0;color:#fff;font-size:.98rem}
.netbanner.testnet{background:#0d6b63}
.netbanner.mainnet{background:#6b3fb5}
body[data-network=mainnet] button{background:#8b5fd6;color:#fff}
body[data-network=mainnet] button:disabled{background:#4d3577}
body[data-network=mainnet] .note{border-left-color:#8b5fd6;background:#1a1229}
.switch{margin-top:22px;color:var(--dim)}
a.card.pick{display:block;text-decoration:none;color:inherit;border-left:6px solid var(--teal)}
a.card.pick.mainnet{border-left-color:#8b5fd6}
a.card.pick:hover{box-shadow:0 0 0 1px var(--green),0 4px 18px rgba(61,245,143,.12)}
a.card.pick.mainnet .tag{background:#21173a;color:#cbb6f5}
/* Riddle panel */
.riddles{position:fixed;inset:auto 16px 16px auto;max-width:420px;width:calc(100% - 32px);z-index:50;background:#06100d;border:1px solid var(--green);border-radius:12px;padding:18px 20px;box-shadow:0 0 30px rgba(61,245,143,.2)}
.riddles[hidden]{display:none}
.riddles h2{margin-top:0}
.riddles ol{padding-left:20px;margin:0}
.riddles li{margin:0 0 12px}
.riddles button{margin-top:6px;padding:6px 14px;font-size:.9rem}
.riddles .ans{color:var(--green);font-family:var(--mono);font-weight:700}
.riddles .close{position:absolute;top:8px;right:10px;margin:0;background:transparent;color:var(--text);border:1px solid var(--line)}
@media (max-width:600px){.banner .overlay .wrap{padding-bottom:18px}.banner p{font-size:.95rem}}
.install{font-size:.92rem;color:var(--dim);border:1px dashed var(--line);border-radius:8px;padding:8px 12px}
.install[hidden]{display:none}
.install button{margin:0 0 0 6px;padding:4px 12px;font-size:.85rem}
@media (max-width:600px){
 .banner picture img{min-height:420px;object-position:70% 30%}
 .banner .overlay{background:linear-gradient(180deg,rgba(2,4,3,0) 0%,rgba(2,4,3,.55) 40%,rgba(2,4,3,.97) 72%)}
 .banner h1{text-shadow:0 1px 2px #000,0 0 12px rgba(61,245,143,.3)}
}

/* Walkthrough video */
.walkthrough video{display:block;width:100%;height:auto;border-radius:12px;border:1px solid var(--green);box-shadow:0 0 0 1px rgba(61,245,143,.12),0 8px 28px rgba(0,0,0,.35);background:#020403}
@media (prefers-reduced-motion: reduce){
 .walkthrough video{/* JS pauses autoplay and adds controls */}
}

.disclaimer{font-size:.8em;opacity:.8;margin:.5em 0 0}
.consent{display:flex;gap:.5em;align-items:center;margin:.75em 0;font-size:.9em}
.consent input{width:auto}
html,body{cursor:url(/assets/cursor-xrp.svg) 16 16,url(/assets/cursor-xrp.png) 16 16,auto}
a,button,label,summary,[role=button]{cursor:pointer}
input[type=text],input:not([type]),textarea{cursor:text}
.sparkle-layer{position:fixed;inset:0;pointer-events:none;z-index:9999;overflow:hidden}
.sparkle{position:absolute;pointer-events:none;background:#fff;clip-path:polygon(50% 0,62% 38%,100% 50%,62% 62%,50% 100%,38% 62%,0 50%,38% 38%);animation:sparkle-fade .6s ease-out forwards}
.sparkle-p{background:#c9b3ff}
@keyframes sparkle-fade{from{opacity:1;transform:translate(0,0) scale(1)}to{opacity:0;transform:translate(var(--dx),var(--dy)) scale(.4)}}
@media (prefers-reduced-motion:reduce){.sparkle-layer{display:none}}
/* Matrix backdrop: canvas behind everything; every text block on a semi-opaque dark panel. */
.matrix-bg{position:fixed;inset:0;width:100vw;height:100vh;z-index:-1;pointer-events:none;opacity:.45}
body.has-matrix{background:#020403}
body.has-matrix header,body.has-matrix footer,body.has-matrix .hero,body.has-matrix .card,body.has-matrix .note{background:rgba(0,0,0,.78);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}
body.has-matrix .hero{padding:24px 20px;margin:24px 0;border-radius:12px;border:1px solid var(--line)}
@media print{.matrix-bg{display:none!important}body.has-matrix header,body.has-matrix footer,body.has-matrix .hero,body.has-matrix .card,body.has-matrix .note{background:transparent!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important}}
/* Balance checker theme: thin cyan outlines, subtle corner brackets, single short fade-in, terminal-style result. */
body.hud .hero,body.hud .card,body.hud form,body.hud .result,body.hud .note{position:relative;border:1px solid rgba(46,230,208,.35);border-radius:6px;background:rgba(0,8,10,.82);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}
body.hud form{padding:16px 18px}
body.hud .hero::before,body.hud .card::before,body.hud form::before,body.hud .result::before{content:"";position:absolute;inset:-1px;pointer-events:none;border-radius:6px;opacity:.7;
 background:linear-gradient(#2ee6d0,#2ee6d0) top left/12px 1px,linear-gradient(#2ee6d0,#2ee6d0) top left/1px 12px,linear-gradient(#2ee6d0,#2ee6d0) top right/12px 1px,linear-gradient(#2ee6d0,#2ee6d0) top right/1px 12px,
 linear-gradient(#2ee6d0,#2ee6d0) bottom left/12px 1px,linear-gradient(#2ee6d0,#2ee6d0) bottom left/1px 12px,linear-gradient(#2ee6d0,#2ee6d0) bottom right/12px 1px,linear-gradient(#2ee6d0,#2ee6d0) bottom right/1px 12px;background-repeat:no-repeat}
body.hud main{animation:hudin .3s ease-out both}
@keyframes hudin{from{opacity:0}to{opacity:1}}
body.hud #addr,body.hud code{font-family:var(--mono)}
body.hud .result{font-family:var(--mono);font-size:.95rem;color:#b9e8d8;padding:14px 16px}
body.hud .result .term{margin:0;white-space:pre-wrap;word-break:break-all}
body.hud .result .term .cmd{color:#6fd8c8}body.hud .result .term .k{color:#8fb8ad}body.hud .result .term .v{color:#c8f5e3}
body.hud .source,body.hud .switch{font-family:var(--mono);font-size:.85rem;color:#b9cfc8;margin:8px 0;padding:6px 10px;background:rgba(0,8,10,.82);border-radius:6px;display:inline-block}
@media (prefers-reduced-motion:reduce){body.hud main{animation:none}}
.visit-count{position:fixed;left:10px;bottom:8px;z-index:50;pointer-events:none;user-select:none;font:12px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.08em;color:#3df58f;background:rgba(0,0,0,.45);padding:3px 6px;border-radius:3px;text-shadow:0 0 6px rgba(61,245,143,.5);animation:vc-fade 2s ease-in-out infinite alternate}
@keyframes vc-fade{from{opacity:.55}to{opacity:.9}}
@media (prefers-reduced-motion:reduce){.visit-count{animation:none;opacity:.75}}
@media print{.visit-count{display:none}}
/* Calm dark cards (xrpl.org-like): rounded, faint border, soft green hover glow, generous spacing; grid on wide screens. */
body .card,body.has-matrix .card,body.hud .card{background:rgba(3,9,8,.86);border:1px solid rgba(46,230,208,.16);border-radius:14px;padding:24px 26px;margin:0 0 22px;transition:border-color .2s,box-shadow .2s}
body .card:hover,body .card:focus-within{border-color:rgba(61,245,143,.4);box-shadow:0 0 0 1px rgba(61,245,143,.08),0 8px 30px rgba(0,0,0,.4)}
body .card.disabled:hover{border-color:rgba(46,230,208,.16);box-shadow:none}
body.hud .card::before{border-radius:14px}
section:has(>.card+.card){display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:22px}
section:has(>.card+.card)>*{margin:0}
section:has(>.card+.card)>:not(.card){grid-column:1/-1}
@media (max-width:600px){body .card{padding:20px 18px;border-radius:12px}}
/* Faint cyber-infrastructure layer (circuit traces, server rack, city grid): static, CSS-only, self-hosted. */
body::before{content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;opacity:.07;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240' fill='none' stroke='%232ee6d0' stroke-width='1'%3E%3Cpath d='M0 60h70l20 20h60l20-20h70M0 180h40l20-20h80l20 20h80M60 0v40l20 20M180 240v-40l-20-20M120 80v80'/%3E%3Ccircle cx='90' cy='80' r='3'/%3E%3Ccircle cx='150' cy='80' r='3'/%3E%3Ccircle cx='60' cy='160' r='3'/%3E%3Ccircle cx='160' cy='180' r='3'/%3E%3Crect x='196' y='96' width='28' height='48' rx='2'/%3E%3Cpath d='M200 106h20M200 116h20M200 126h20'/%3E%3C/svg%3E") repeat,linear-gradient(transparent 0 calc(100% - 1px),rgba(46,230,208,.5) 0) 0 0/80px 80px,linear-gradient(90deg,transparent 0 calc(100% - 1px),rgba(46,230,208,.5) 0) 0 0/80px 80px}
@media print{body::before{display:none!important}body .card{box-shadow:none!important;border-color:#999!important;background:transparent!important}}

details.explainer summary{font-weight:600;color:#7cffb0;list-style:none}
details.explainer summary::-webkit-details-marker{display:none}
details.explainer summary::before{content:"+ ";color:#2ee6d0}
details.explainer[open] summary::before{content:"\2212  "}
details.explainer p{margin:12px 0 0;color:#c3d4ce;line-height:1.6}
#site-version{margin:0 0 8px;font-size:.8rem;opacity:.75}